The Screw,close Tolerance, cataloged under National Stock Number 5305-01-512-8359, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 18 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-512-8359 |
| Primary Part Number | 3M1170C5-18A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Point Diameter | 0.469 INCHES NOMINAL IN |
| Fastener Length | 1.579 INCHES MINIMUM AND 1.609 INCHES MAXIMUM IN |
| Thread Length | 0.312 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spline Major Diameter | 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Grip Diameter | 0.312 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 5820 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | TORX |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Diameter | 0.438 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN |
| Head Diameter | 0.464 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| TX1027C5-18A | Hi-Shear Corporation (USA) |
| 3M1170C5-18A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| TX1027C5-18A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M1170C5-18A | Heartland Precision Fasteners Inc (USA) |
| WC1170C5-18A | West Coast Aerospace, Inc. (USA) |
| TX1027C5-18A | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| 3M1170C5-18A | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| GS1014C5-18A | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| TX1027C5-18A | Howmet Global Fastening Systems Inc (USA) |
| TX1027C5-18A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| TX1027C5-18A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1170C5-18A | Saturn Fasteners Inc (USA) |
| 3M1170C5-18A PRIMARY | The Boeing Company Div Defense (USA) |
| 3M1170C5-18A | Houston Precision Fasteners I Lp (USA) |
| TX1027C5-18A | Huck International, Inc (USA) |
| 11845C5-18A | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1170C5-18A | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| TX1027C5-18A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| TX1027C5-18A | 5/2 Secondary reference U.S. Government activity |
| TX1027C5-18A | 5/2 Secondary reference U.S. Government activity |
| TX1027C5-18A | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-512-8359 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-512-8359 has 18 manufacturer part numbers on file: TX1027C5-18A (Hi-Shear Corporation), 3M1170C5-18A (Fastener Innovation Technology, Inc. Dba F I T), TX1027C5-18A (Sps Technologies, Llc Dba PB Fasteners), 3M1170C5-18A (Heartland Precision Fasteners Inc), WC1170C5-18A (West Coast Aerospace, Inc.) and 13 more.
Key specifications for 3M1170C5-18A: Point Diameter: 0.469 INCHES NOMINAL IN; Fastener Length: 1.579 INCHES MINIMUM AND 1.609 INCHES MAXIMUM IN; Thread Length: 0.312 INCHES NOMINAL IN; Material Document and Classification: AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 21 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.